<template>
    <div>
        <div class="search">
            <div class="serchIcon">
                <span class="iconfont">&#xe632;</span>
            </div>
            <input 
                v-model="keyword"
                class="search-input" 
                type="text" 
                placeholder="请输入城市名或拼音"
            />
        </div>
        <div class="search-content"  v-show="keyword" ref="search">
            <ul>
                <li 
                    class="search-item border-bottom"
                    v-for="item of list" 
                    :key="item.id"
                    @click="handleCityClick(item.name)"
                >
                    {{item.name}}
                </li>
                <li class="search-item border-bottom" v-show="hasNoData">没有找到匹配数据</li>
            </ul>
        </div>
    </div>   
</template>

<script>
import Bscroll from 'better-scroll'
export default {
    name: 'CitySearch',
    props: {
        cities: Object
    },
    data () {
        return {
            keyword: '',
            list: [],
            timer: null
        }
    },
    methods: {
       handleCityClick (city) {
           this.$store.commit('changeCity', city)
           this.$router.push('/')
       } 
    },
    computed: {
        hasNoData()  {
            return !this.list.length
        } 
    },
    watch: {
        keyword () {
            if(this.timer) {
                clearTimeout(this.timer)
            }
            if(!this.keyword){
                this.list = []
                return
            }
            this.timer = setTimeout(() => {
                const result = []
                for (let i in this.cities) {
                    this.cities[i].forEach((value) => {
                        if(value.spell.indexOf(this.keyword) > -1 || 
                        value.name.indexOf(this.keyword) > -1) {
                            result.push(value)
                        }
                    })
                }
                this.list = result
            },100)
        }
    },
    mounted () {
    this.scroll = new Bscroll(this.$refs.search)
  }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .search
        position: relative
        height: .52rem
        background: $bgColor
        padding: 0 .1rem
        .serchIcon
            width: .3rem
            height: .42rem
            line-height: .42rem
            position: absolute
            left: .12rem
            color: #666
        .search-input
            box-sizing: border-box
            width: 100%
            height: .42rem
            line-height: .42rem
            border-radius: .05rem
            text-indent: .4rem
            padding: 0 .1rem
            color: #666
    .search-content
        z-index: 1
        //overflow: hidden
        position: absolute
        top: 1.38rem
        left: 0
        right: 0
        bottom: 0
        .search-item
            line-height: .62rem
            padding-left: .2rem
            color: #666
            background: #fff      
</style>
